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Finding the Fourth Proportional to 443,586.60, 665,466.30 and 128,053.80

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Solution

The fourth proportional to 443,586.60, 665,466.30 and 128,053.80 is: 192,105.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,586.60 : 665,466.30 = 128,053.80 : x
  2. Step 2: Convert to fraction form
    443,586.60/665,466.30 = 128,053.80/x
  3. Step 3: Cross multiply
    443,586.60x = 665,466.30 × 128,053.80
  4. Step 4: Simplify right side
    443,586.60x = 85,215,488,486.94
  5. Step 5: Solve for x
    x = 85,215,488,486.94/443,586.60
  6. Step 6: Final answer
    x = 192,105.64

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.